The Collaborative International Dictionary of English v.0.48:

Dubber \Dub"ber\, n.
   One who, or that which, dubs.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dubber \Dub"ber\, n. [Hind. dabbah.]
   A globular vessel or bottle of leather, used in India to hold
   ghee, oil, etc. [Also written dupper.] --M'Culloch.
   [1913 Webster]